<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">

    <title>Our superheroes</title>

    <link href="https://fonts.googleapis.com/css?family=Faster+One" rel="stylesheet">
    <link rel="stylesheet" href="ajax.css">
  </head>

  <body>

      <header>

      </header>

      <section>

      </section>

    <script>
    var header = document.querySelector('header');
    var section = document.querySelector('section');

    var requestURL = 'https://mdn.github.io/learning-area/javascript/oojs/json/superheroes.json';
    var request = new XMLHttpRequest();
    request.open('GET', requestURL);
    request.responseType = 'json';
    request.send();

    request.onload = function() {
      var superHeroes = request.response;
      populateHeader(superHeroes);
      showHeroes(superHeroes);
    }

    function populateHeader(jsonObj) {
      var myH1 = document.createElement('h1');
      myH1.textContent = jsonObj['squadName'];
      header.appendChild(myH1);

      var myPara = document.createElement('p');
      myPara.textContent = 'Hometown: ' + jsonObj['homeTown'] + ' // Formed: ' + jsonObj['formed'];
      header.appendChild(myPara);

    }

    function showHeroes(jsonObj) {
      var heroes = jsonObj['members'];

      for(i = 0; i < heroes.length; i++) {
        var myArticle = document.createElement('article');
        var myH2 = document.createElement('h2');
        var myPara1 = document.createElement('p');
        var myPara2 = document.createElement('p');
        var myPara3 = document.createElement('p');
        var myList = document.createElement('ul');

        myH2.textContent = heroes[i].name;
        myPara1.textContent = 'Secret identity: ' + heroes[i].secretIdentity;
        myPara2.textContent = 'Age: ' + heroes[i].age;
        myPara3.textContent = 'Superpowers:';

        var superPowers = heroes[i].powers;
        for(j = 0; j < superPowers.length; j++) {
          var listItem = document.createElement('li');
          listItem.textContent = superPowers[j];
          myList.appendChild(listItem);
        }

        myArticle.appendChild(myH2);
        myArticle.appendChild(myPara1);
        myArticle.appendChild(myPara2);
        myArticle.appendChild(myPara3);
        myArticle.appendChild(myList);

        section.appendChild(myArticle);
      }
    }

    </script>
  </body>
</html>
